(19)

(11)

EP 4 078 038 A1

(12)

(43) Date of publication: 26.10.2022 Bulletin 2022/43 (21) Application number: 20838447.9 (22) Date of filing: 18.12.2020

(51) International Patent Classification (IPC):  F24F 11/33(2018.01) F24F 13/24(2006.01) F24F 13/02(2006.01) (52) Cooperative Patent Classification (CPC): F24F 11/33; F24F 13/0263; F24F 2013/242 (86) International application number: PCT/EP2020/087038 (87) International publication number: WO 2021/123180 (24.06.2021 Gazette 2021/25)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 19.12.2019 FI 20196102 (71) Applicant: FläktGroup Sweden AB 551 84 Jönköping (SE)	(72) Inventors: MIKKONEN, Jari 37801 Akaa (FI) HOKKANEN, Jari 37801 Akaa (FI) KAASALAINEN, Timo 37801 Akaa (FI) (74) Representative: Kolster Oy Ab  Salmisaarenaukio 1 P.O. Box 204 00181 Helsinki 00181 Helsinki (FI)